Document 260-1
Common Mode Chokes - BU Series
These low cost, high efficiency choke coils are designed
to virtually eliminate line conducted common mode
noise.
The BU9S and BU9HS families are ideal for signal line
applications; the others can be used in switching power
supplies and power supply circuits. All provide signifi-
cant attenuation of common mode noise across a broad
range of frequencies.
For height-restricted applications, the BU9 and BU9S
filters are available in a horizontal configuration, which
reduces their height to under half an inch (12.5 mm).
For free evaluation samples, contact Coilcraft or request
them on-line at
www.coilcraft.com.
Specifications subject to change without notice.
Document 260-1
Revised 4/19/02
Document 260-2
Common Mode Chokes - BU9, BU9H Series
Part number
BU9-103
BU9-282
BU9-132
BU9-601
BU9-201
BU9H-103
BU9H-282
BU9H-132
BU9H-601
BU9H-201
Impedance max
(kOhms)
60 @ 220 kHz
53 @ 410 kHz
52 @ 660 kHz
36 @ 1300 kHz
5.4 @ 1500 kHz
60 @ 220 kHz
53 @ 410 kHz
52 @ 660 kHz
36 @ 1300 kHz
5.4 @ 1500 kHz
Frequency range
@ 75% of
impedance max
200 – 240 kHz
310 – 430 kHz
600 – 700 kHz
1200 – 1400 kHz
900 – 2100 kHz
200 – 240 kHz
310 – 430 kHz
600 – 700 kHz
1200 – 1400 kHz
900 – 2100 kHz
DCR
(Ohms)
3.5
1.0
0.5
0.2
0.1
3.5
1.0
0.5
0.2
0.1
Inductance
1
Inductance difference
Current
L1, L2
L1 - L2
max (Aac)
min (mH)
max (µH)
0.25
10.0
200
0.50
2.8
50
0.70
1.3
50
1.00
0.6
25
1.60
0.2
25
0.25
10.0
200
0.50
2.8
50
0.70
1.3
50
1.00
0.6
25
1.60
0.2
25
1. Inductance tested @ 1 kHz, 1 Vrms, and measured on Agilent/HP4284A LCR-meter or equivalent.
2. Operating temperature range
−25°C
to +80°C.
3. Electrical specifications at 25°C.
Typical Response
Typical Impedance
BU9
BU9H
Specifications subject to change without notice.
Document 260-2
Revised 7/29/02
Document 260-3
Common Mode Chokes - BU9S, BU9HS Series
Part number
BU9S-153
BU9S-702
BU9HS-153
BU9HS-702
Impedance max
(kOhms)
71 @ 210 kHz
66 @ 330 kHz
71 @ 210 kHz
66 @ 330 kHz
Frequency range
@ 75% of
impedance max
190 – 230 kHz
300 – 360 kHz
190 – 230 kHz
300 – 360 kHz
DCR
(Ohms)
5.0
2.5
5.0
2.5
Inductance
1
Inductance difference
Current
L1, L2
L1 - L2
max (Aac)
min (mH)
max (µH)
0.15
15.0
300
0.30
7.0
200
0.15
15.0
300
0.30
7.0
200
1. Inductance tested @ 1 kHz, 1 Vrms, and measured on Agilent/HP4284A LCR-meter or equivalent.
2. Operating temperature range
−25°C
to +80°C.
3. Electrical specifications at 25°C.
Typical Response
Typical Impedance
BU9S
BU9HS
Specifications subject to change without notice.
Document 260-3
Revised 7/29/02
Document 260-4
Common Mode Chokes - BU10 Series
Part number
BU10-181
BU10-131
BU10-101
BU10-600
Impedance max
(kOhms)
3.9 @ 1.8 MHz
2.2 @ 2.2 MHz
1.6 @ 3.1 MHz
1.0 @ 3.0 MHz
Frequency range
@ 75% of
impedance max
1000 – 3200 kHz
800 – 2000 kHz
1300 – 8900 kHz
800 – 10000 kHz
DCR
(Ohms)
0.20
0.12
0.08
0.04
Inductance
1
Inductance difference
Current
L1, L2
L1 - L2
max (Aac)
min (mH)
max (µH)
1.20
0.18
30
1.60
0.13
20
2.20
0.10
15
3.00
0.06
10
1. Inductance tested @ 1 kHz, 1 Vrms, and measured on Agilent/HP4284A LCR-meter or equivalent.
2. Operating temperature range
−25°C
to +80°C.
3. Electrical specifications at 25°C.
Typical Response
Typical Impedance
Specifications subject to change without notice.
Document 260-4
Revised 7/29/02
Document 260-5
Common Mode Chokes - BU15 Series
Part number
BU15-453
BU15-143
BU15-752
BU15-442
BU15-272
Impedance max
(kOhms)
400 @ 230 kHz
115 @ 470 kHz
60 @ 600 kHz
36 @ 670 kHz
20 @ 1000 kHz
Frequency range
@ 75% of
impedance max
140 – 160 kHz
400 – 650 kHz
420 – 720 kHz
430 – 1000 kHz
510 – 1400 kHz
DCR
(Ohms)
3.0
1.0
0.6
0.3
0.2
Inductance
1
Inductance difference
Current
L1, L2
L1 - L2
max (Aac)
min (mH)
max (µH)
0.40
45.0
300
0.70
14.0
300
1.00
7.5
150
1.30
4.4
100
1.60
2.7
60
1. Inductance tested @ 1 kHz, 1 Vrms, and measured on Agilent/HP4284A LCR-meter or equivalent.
2. Operating temperature range
−25°C
to +80°C.
3. Electrical specifications at 25°C.
Typical Response
Typical Impedance
Specifications subject to change without notice.
Document 260-5
Revised 7/29/02
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